“The number of links a node has; may be divided into in-degree (the number of links to a node) and out-degree (the number of links from a node).”

References

Garrett, K.A., Alcalá-Briseño, R.I., Andersen, K.F., Buddenhagen, C.E., Choudhury, R.A., Fulton, J.C., Hernandez Nopsa, J.F., Poudel, R., Xing, Y., 2018. Network Analysis: A Systems Framework to Address Grand Challenges in Plant Pathology. Annu. Rev. Phytopathol. 56, 559–580. https://doi.org/10.1146/annurev-phyto-080516-035326